Force measurements were obtained with a new sensitive balance for a range of nose shapes and cavitation parameters (K) under conditions of open- cavity flow. Drag-coefficient (CD) data were obtained for a 12- to 25-ft/sec range on model sizes ranging from 0.500 to 1.414 in. in diameter for the sharper cone. The experiments indicate a remarkable consistency and a close check with the theory. Two exceptions were noted: flow discrepancies, about sharphy pointed cones, with those indicated by the approximate cavity-drag theory of Plesset and Shaffer; and definite slope differences (which increase with decreasing cone angle) of the experimental curve with the line given by CD+CDO(1 + K).